胶印联机冷烫胶黏剂的性能要求分析

Performance Requirements Analysis of Adhesive Used for the Online Cold Stamping in the Offset Printing Line

目的获得胶印联机冷烫用胶黏剂的性能和冷烫印质量的关系,提出胶印联机冷烫用胶黏剂的性能要求。方法选用一种商用胶印联机冷烫胶黏剂,测试黏度、粘弹性、触变性、乳化率、粘性、干燥速率和固含量,分析其与冷烫印质量的关系。结果冷烫胶黏剂的初粘性要高并维持稳定,且具有较快的干燥速率。印刷适性如黏度、粘弹性、触变性、乳化率和普通胶印油墨要求相近,在保证印刷适性、粘性和合适的干燥速率的前提下,固含量越高越好。结论研究结果可为胶印联机冷烫胶黏剂的改进和胶印冷烫质量的提高提供参考。

The aims of this study was to obtain the relationship between the performance of adhesive and cold stamping quality,and to put forward the performance requirements of adhesive used for the online cold stamping in the offset printing line. The performance parameters such as viscosity,viscoelasticity,thixotropy,emulsification ratio,tack value,drying rate and solid content of a commercial adhesive for online cold stamping were tested. The relationship between the performance of adhesive and cold stamping quality was analyzed. The tack value of the adhesive should be large and kept stable. The drying rate should be quick. Printability requirements such as viscosity,viscoelasticity,thixotropy,emulsification ratio of the adhesive were the same as those of the common offset printing ink. On the premise of appropriate printability,tack value,drying rate,higher solid content of the adhesive was always better. The results would provide reference for improvement of adhesive and quality of online cold stamping in the offset printing line.